Zobrazeno 1 - 10
of 2 959
pro vyhledávání: '"Freitas JR"'
Autor:
Antonioli, Roberto P., Braga Jr., Iran M., Fodor, Gabor, Silva, Yuri C. B., Freitas Jr, Walter C.
Existing works on cell-free systems consider either coherent or non-coherent downlink data transmission and a network deployment with a single central processing unit (CPU). While it is known that coherent transmission outperforms noncoherent transmi
Externí odkaz:
http://arxiv.org/abs/2212.13950
Autor:
Saraiva, Juno V., Antonioli, Roberto P., Fodor, Gábor, Freitas Jr., Walter C., Silva, Yuri C. B.
This paper investigates cell-free massive multiple input multiple output systems with a particular focus on uplink power allocation. In these systems, uplink power control is highly non-trivial, since a single user terminal is associated with multipl
Externí odkaz:
http://arxiv.org/abs/2212.13804
Autor:
Braga Jr., Iran M., Antonioli, Roberto P., Fodor, Gabor, Silva, Yuri C. B., Freitas Jr, Walter C.
This paper investigates wireless-powered cell-free systems, in which the users send their uplink data signal while simultaneously harvesting energy from network nodes and user terminals - including the transmitting user terminal itself - by performin
Externí odkaz:
http://arxiv.org/abs/2212.13798
Autor:
Villarroel, Beatriz, Solano, Enrique, Guergouri, Hichem, Streblyanska, Alina, Mattsson, Lars, Bär, Rudolf E., Mimouni, Jamal, Geier, Stefan, Gupta, Alok C., Okororie, Vanessa, Laggoune, Khaoula, Shultz, Matthew E., Freitas Jr., Robert A., Ward, Martin J.
Old, digitized astronomical images taken before the human spacefaring age offer a unique view of the sky devoid of known artificial satellites. In this paper, we have carried out the first optical searches ever for non-terrestrial artifacts near the
Externí odkaz:
http://arxiv.org/abs/2204.06091
Autor:
Daros Máskio, Amaral Jr. Antônio Teixeira do, Pereira Messias Gonzaga, Santos Fabrício Santana, Gabriel Ana Paula Cândido, Scapim Carlos Alberto, Freitas Jr. Silvério de Paiva, Silvério Lucas
Publikováno v:
Scientia Agricola, Vol 61, Iss 6, Pp 609-614 (2004)
Although much appreciated in Brazil, commercial popcorn is currently cropped on a fairly small scale. A number of problems need to be solved to increase production, notably the obtaintion of seeds with good agronomic traits and good culinary characte
Externí odkaz:
https://doaj.org/article/22ac06da5b6b4157865c1a73ed5d798f
Publikováno v:
Arquivos Brasileiros de Cardiologia, Vol 121, Iss 3 (2024)
Externí odkaz:
https://doaj.org/article/eeeaa1e03f2c42df98ca6b8495de4a5d
Autor:
Braga Jr., Iran M., Antonioli, Roberto P., Fodor, Gabor, Silva, Yuri C. B., Silva, Carlos F. M. e, Freitas Jr, Walter C.
Due to the continuous advancements of orthogonal frequency division multiplexing (OFDM) and multiple antenna techniques, multiuser multiple input multiple output (MU-MIMO) OFDM is a key enabler of both fourth and fifth generation networks. In this pa
Externí odkaz:
http://arxiv.org/abs/2103.15968
Autor:
Mastro, Michael A., Kim, Byung-Jae, Freitas, Jr., J. A., Caldwell, Joshua D., Rendell, Ron, Hite, Jennifer, Eddy, Jr., Charles R., Kim, Jihyun
Publikováno v:
Proceedings of SPIE - The International Society for Optical Engineering 8096 (2011)
Silver nanoparticles dispersed on the surface of an inverted GaN LED were found to plasmonically enhance the near-bandedge emission. The resonant surface plasmon coupling led to a significant enhancement in the exciton decay rate and the ensemble of
Externí odkaz:
http://arxiv.org/abs/2009.02141
Autor:
Saraiva, Juno V., Braga Jr., Iran M., Monteiro, Victor F., Lima, F. Rafael M., Maciel, Tarcisio F., Freitas Jr., Walter C., Cavalcanti, F. Rodrigo P.
In this article, we study a Radio Resource Allocation (RRA) that was formulated as a non-convex optimization problem whose main aim is to maximize the spectral efficiency subject to satisfaction guarantees in multiservice wireless systems. This probl
Externí odkaz:
http://arxiv.org/abs/2003.02643
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